SAK-C504 Infineon Technologies AG, SAK-C504 Datasheet - Page 33

• Manufacturer Part Number: SAK-C504
• Description: 8-Bit Single-Chip Microcontroller
• Manufacturer: Infineon Technologies AG

The A/D Converter uses two clock signals for operation: the conversion clock
t
clock
multiple of the period of the
ratios and the resulting A/D conversion times which must be selected for typical system
clock rates.
Figure 15
The analog inputs are located at Port 1 and Port 3 (4 lines on each port). The
corresponding Port 1 and Port 3 pins have a port structure, which allows the pins to be
used either as digital I/Os or analog inputs. The analog input function of these mixed
digital/analog port lines is selected via the registers P1ANA and P3ANA.
Data Sheet
ADC
MCU System Clock
Rate (
3.5 MHz
12 MHz
16 MHz
24 MHz
32 MHz
40 MHz
) and the input clock
f
OSC
f
OSC
which is applied at the XTAL pins. The duration of an A/D conversion is a
)
A/D Converter Clock Selection
f
[MHz]
1.75
6
8
12
16
20
IN
f
IN
(= 1/
f
IN
clock signal. The table in Figure 15 shows the prescaler
Prescaler
Ratio
t
IN
4
4
4
8
8
16
). Both clock signals are derived from the C504 system
ADCL1 ADCL0
0
0
0
0
0
1
29
0
0
0
1
1
0
f
[MHz]
.438
1.5
2
1.5
2
1.25
ADC
A/D
Conversion
Time [ s]
48
48
48
96
96
192
t
t
t
t
t
IN
IN
IN
IN
IN
t
IN
= 27.4
= 8
= 6
= 8
= 6
= 9.6
f
ADC
2000-05
C504
(= 1/